package com.hmdp.utils;


import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

@Component
@Slf4j
public class RedisIdWorker {
    private static final long BEGIN_TIMESTAMP = 1750204800L;

    private static final int COUNT_BITS = 32;


    @Resource
    private StringRedisTemplate stringRedisTemplate;

    public long nextId(String keyPrefix){
         //生成时间戳
        LocalDateTime now = LocalDateTime.now();
        long nowSecond = now.toEpochSecond(ZoneOffset.UTC);
        long nowTimeStamp = nowSecond - BEGIN_TIMESTAMP;


        //生成序列号
        //获取当前日期，精确到天
        String date = now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));
        long count = stringRedisTemplate.opsForValue().increment("icr:" + keyPrefix + ":" + date);


        return (nowTimeStamp<<COUNT_BITS)|count;
    }

}
